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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<!-- splitted from ./en/functions/gettext.xml, last change in rev 1.2 -->
<refentry xml:id="function.textdomain" xmlns="http://docbook.org/ns/docbook">
<refnamediv>
<refname>textdomain</refname>
<refpurpose>Sets the default domain</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type>string</type><methodname>textdomain</methodname>
<methodparam choice="opt"><type class="union"><type>string</type><type>null</type></type><parameter>domain</parameter><initializer>&null;</initializer></methodparam>
</methodsynopsis>
<para>
This function sets the domain to search within when calls are
made to <function>gettext</function>, usually the named after an
application.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>domain</parameter></term>
<listitem>
<para>
The new message domain, or &null; to get the current setting without
changing it
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
If successful, this function returns the current message
domain, after possibly changing it.
</para>
</refsect1>
<refsect1 role="errors">
&reftitle.errors;
<simpara>
Throws a <exceptionname>ValueError</exceptionname> if <parameter>domain</parameter>
is the empty <type>string</type>.
</simpara>
</refsect1>
<refsect1 role="changelog">
&reftitle.changelog;
<informaltable>
<tgroup cols="2">
<thead>
<row>
<entry>&Version;</entry>
<entry>&Description;</entry>
</row>
</thead>
<tbody>
<row>
<entry>8.4.0</entry>
<entry>
Now throws a <exceptionname>ValueError</exceptionname> if <parameter>domain</parameter>
is the empty <type>string</type>.
</entry>
</row>
<row>
<entry>8.4.0</entry>
<entry>
<parameter>domain</parameter> is optional now.
Previously, the parameter always had to be specified.
</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</refsect1>
<refsect1 role="notes">
&reftitle.notes;
<note>
<para>
The <function>textdomain</function> information is maintained per process,
not per thread.
</para>
</note>
</refsect1>
</refentry>
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